Torque is angular momentum with time as a derivative, as force is the derivative of momentum with time. In physics, force is a vector that can be understood as struggle. Two of my artist friends through this physical concept and i develop specific performance requirements, such as tight muscles and hold for 5 minutes, touching textiles, and roll up their sleeves to reveal their bodies. But in these two works didn’t appear their faces, just only to see their bodies precarious and twitch in the videos.